A Flat Rectangular Loop of Wire Is Placed Between the Poles

question 132

Multiple Choice

A flat rectangular loop of wire is placed between the poles of a magnet, as shown in the figure. It has dimensions $w = 0.60 \mathrm {~m}$ and $L = 1.0 \mathrm {~m}$ , and carries a current $I = 2.0 \mathrm {~A}$ in the direction shown. The magnetic field due to the magnet is uniform and of magnitude $0.80 \mathrm {~T}$ . The loop rotates in the magnetic field and at one point the plane of the loop is parallel to the field. At that instant, what is the magnitude of the torque acting on the wire due to the magnetic field?

• A) \(0.96 \mathrm {~N} \cdot \mathrm { m }\)
• B) \(0.48 \mathrm {~N} \cdot \mathrm { m }\)
• C) \(0.40 \mathrm {~N} \cdot \mathrm { m }\)
• D) \(0.83 \mathrm {~N} \cdot \mathrm { m }\)
• E) \(0.00 \mathrm {~N} \cdot \mathrm { m }\)

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Definitions:

Neck Length

The measurement from the base of the skull to the base of the neck, significant in various biological and anthropological studies.

Natural Selection

A process in evolutionary biology where organisms better adapted to their environment tend to survive and reproduce more than those less adapted, leading to evolutionary changes.

Variation Among Organisms

The differences in physical form, physiology, and behavior among individuals within a species, driven by genetic and environmental factors.

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An archipelago of volcanic islands in the Pacific Ocean, known for their unique ecosystem which influenced Charles Darwin's theory of natural selection.